createMock and non-abstract methods in an abstract class

Question

I have an abstract class that I'd like to mock out for testing purposes:

public abstract class Foo {
    public abstract void bar();
    public void baz() {
      System.out.print("Hi from baz!");
    }
}

If I use easyMock Foo mock = createNiceMock(Foo.class) and then call mock.baz() I get a java.lang.NullPointerException . If I change baz() to final , things work swimmingly (I assume this has to do with the fact EasyMock can't mock final methods) but I would like to be able to call baz() without doing this.

Is there a way to create a mock object using EasyMock that allows me to call my non- abstract methods?

The one workaround I'm currently using is:

Foo mock = new Foo() {
    @Override
    public void bar() {
        return;
    }
}

but this is super ugly.

Answer 1

So I found a solution to my question. You can create partial mocks in EasyMock:

Foo mock = EasyMock.createMockBuilder(Foo.class) 
                .addMockedMethod("bar")
                .createNiceMock();

The one caveat to this is that if the class has instance variables, as you are not using new they won't be initialized! If anyone has a workaround for this aspect, that would be useful. That is creating a partial for this class:

public abstract class Foo {
    public double myInstanceVariable = 2;
    public abstract void bar();
    public void baz() {
      System.out.print("Hi from baz!");
    }
}

Where it's possible to call mock.myInstanceVariable and get 2 .